add tests for decoding packet header chunk

internal/decoders/packet_header_chunk_test.go

@@ -0,0 +1,51 @@
+package decoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+)
+
+func TestGoodPacketHeaderChunkDecoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		bytes       []byte
+		expected    PacketHeaderChunk
+	}{
+		{
+			description: "PacketHeaderChunk",
+			bytes: []byte{
+				0, 0, 12, 0, 210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123,
+			},
+			expected: PacketHeaderChunk{
+				Chunk: Chunk{
+					ChunkData: []byte{210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123},
+					Header:    ChunkHeader{DataLen: 12, Id: 0, HasSubchunks: false},
+				},
+				Data: PacketHeaderChunkData{
+					PacketTimestamp:  1234567890,
+					VersionHigh:      2,
+					VersionLow:       3,
+					FrameId:          1,
+					FramePacketCount: 123,
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual, err := DecodePacketHeaderChunk(testCase.bytes)
+
+		if err != nil {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Println(err)
+		}
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Printf("expected: %+v\n", testCase.expected)
+			fmt.Printf("actual: %+v\n", actual)
+		}
+	}
+}